Overview

overview

10

Static

static

3

a7c2b8d081...de.exe

windows7-x64

10

a7c2b8d081...de.exe

windows10-2004-x64

10

Sharing

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General

  • Target
    a7c2b8d081407da5d72f12eeef21c11674ff616c89be40f73f114c292c09e6de.zip
  • Size 141KB
  • Sample240402-l8nfcaed61
  • SHA256 7f0c6ca42041259ece6fda8841d56353e0794664dd023c9da158bd53bdfb8410
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
tofseeevasionpersistencetrojan

Malware Config

Extracted

Family

  • tofsee

C2

  • vanaheim.cn

  • jotunheim.name

Targets

    • Target
      a7c2b8d081407da5d72f12eeef21c11674ff616c89be40f73f114c292c09e6de.exe
    • Size 227KB
    • SHA256 a7c2b8d081407da5d72f12eeef21c11674ff616c89be40f73f114c292c09e6de
    • MD5 SHA1 SHA512 SSDEEP
    Score
    10/10
    tofseeevasionpersistencetrojan

    • Tofsee

      Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

      trojantofsee

    • Windows security bypass

      evasiontrojan

    • Creates new service(s)

      persistence

    • Modifies Windows Firewall

      evasion

    • Sets service image path in registry

      persistence

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Deletes itself

    • Executes dropped EXE

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

    behavioral1behavioral2

MITRE ATT&CK Enterprise v15

Tasks